Battery booster



FIG. 1 is front view of the battery booster according to the present invention.

FIG. 2 is a rear view of the battery booster of FIG. 1.

FIG. 3 is a right side view of the battery booster of FIG. 1.

FIG. 4 is a left side view of the battery booster of FIG. 1.

FIG. 5 is a top view of the battery booster of FIG. 1.

FIG. 6 is a bottom view of the battery booster of FIG. 1; and,

FIG. 7 is a perspective view of the battery booster of FIG. 1.

The dashed lines represent environmental elements only and form no part of the claimed design. 

The ornamental design for a battery booster, as shown and described. 